This the first iteration of Wireguard network support.
What was done:
- kernel was updated to enable Wireguard kernel module.
- changed networkd to support creating Wireguard device type.
- used wgctrl to configure wireguard.
- updated `talosctl cluster create` to support generating Wireguard
network configuration automatically by just specifying the network cidr.
- added docs about Wireguard support/how to use it.
Signed-off-by: Artem Chernyshev <artem.0xD2@gmail.com>
